Square D QOB2501021 Circuit Breaker 50A 240V 2 Pole

Product Description

The SQUARE D QOB2501021 is a 2-pole, bolt-on miniature circuit breaker rated at 50 amps and 240 VAC. It provides overcurrent and short-circuit protection for branch circuits in residential and light commercial electrical panels. The breaker accepts wire sizes from 8 to 2 AWG via box lug terminals, making it compatible with a range of conductor gauges used in standard branch circuit applications. Licensed electricians install this breaker as a direct panel component, typically protecting loads such as HVAC equipment, water heaters, dryers, and sub-panels. It carries UL Listed and CSA certifications and meets RoHS compliance standards.

This bolt-on breaker is suited for use in panelboards that accept QOB-series breakers. Its bolt-on mounting style ensures a secure, vibration-resistant connection, which is preferred in commercial and industrial enclosures as well as residential load centers where positive retention is required. The breaker is also noted for use with shunt trip accessories rated at 120, 208, or 240 VAC, enabling remote trip functionality for applications that require external disconnect signaling such as fire alarm integration or emergency shutoff systems.

Key Features

• 50 amp continuous rating at 240 VAC for 2-pole branch circuit protection
• Bolt-on mounting type for secure, vibration-resistant panel installation
• Box lug terminal connection accepts 8 to 2 AWG conductors
• Compatible with shunt trip accessories at 120, 208, or 240 VAC for remote trip capability
• UL Listed, CSA certified, and RoHS compliant

Compatibility

Designed for use with panelboards that accept QOB bolt-on series circuit breakers. Compatible with shunt trip accessories rated at 120/208/240 VAC as stated by the manufacturer.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the panel before handling or installing the breaker. Verify conductor size falls within the 8 to 2 AWG range before terminating at the box lugs. Do not exceed the breaker's rated amperage or voltage when sizing the protected circuit.